Theatres maps each performer to the playhouses where they worked, a bipartite graph of houses and players weighted by appearances. Co‑casting draws a line between every pair of performers who shared a stage more than twice, revealing the ensembles that gave each house its character. Programme connects each mainpiece to the afterpieces it was billed with: a map of the evening’s typical architecture. Works links performers to the plays and entertainments they appeared in most, showing who “owned” a role or repertoire. Ecosystem places all three node types, playhouses, performers, and works, in a single graph, tracing the full web of theatrical relations. Venues connects playhouses by the performers they shared, revealing which houses competed for the same talent and which operated in separate worlds.